I finally took a stab at Craigs List. A few weekends ago we cleaned up the back yard (along with the deck) and I thought it would be nice to get a sandbox or a water table. I settled for a sand box once I found one within 10 miles at just the right price. I responded to the listing on a Sunday evening and by the next afternoon we had a sandbox on the deck.
Although I am not sure about the whole picnic table attachment, since it is sort of like eating IN the sand, but so far the twins are loving it.